welcome from down under there are several builds being done your way but don't know if any is doing a cracker box. and don't worry about all the thinking about the building the boat it go with building a boat
we all get it when it comes to our build.
Don't be afraid to attempt anything. You might surprise your self in the attempt.http://www.facebook.com/Home.Made.Boat.Building
Modified Jubilee-"Wild Flower" 40' house boat
14' Mr John-Wild Flower 2
32' Supper Huck- Wild flower 3